Improvement in construction of sheet-metal



liv

. UNITED-"STATES PATENT OFFICE.

DANIEL cRoAK, or MILWAUKEE, WIscoNsiN.

IMPRovEMENT |N CONSTRUCTION oF s-HEETMETAL'Bo'xEs.,

specification forming part of Letters Patent No. :Messdaten oefenen-3, 1865.'

To all whom it may concern.- y

Beit known that I, DANIEL GRoAK, ot' Milwaukee, inthe county of Milwaukee and'State of Wisconsin, have invented a new anduseful Improvement in the Construction of Sheet- Metal Boxes or Gans; and I do hereby declare` that the following isa full,'clear,'andexact description thereof, which will enable those "skilled in the art to make and `use the saine, reference being had to` the accompanying drawirtpgs, forming part of'- this specification, in which- Figure l is an external yiewof my inven tion Fig. 2, a vertical centralsection of the saine; Fig. 3,;-a View of the Ine-tal strip of which the bod y of the boxis composed formed or cut ready for bending-L l t u Similar letters of reference indicate corresponding` parts.

This inrention relates to a new and improved Inode ot constructing` sheet-metal boxes. orv

cans; and it consists in a novel manner of forming the seam, as herein shown and described.

The body ot' the box or can is composed ot' a piece of sheet metal, A, cut out of the proper dimensions and notched at each end, as shown at ax a X, to forni three projections or lips, a e' c, at one end, and two, b b', at the other end, the lips ct ai at one end. being in line with the notches aux at the opposite end, and the lips b 7)/ in line with' the notches of, the notches and lips corresponding` in dimensions,

so that thcnlatter, when the sheetmetal platev h A is bent in cylindrical form, may fit into the former, as shown clearly in'Fig. 2.

The upper lip or projection, biggat 'oneend :'"o'f the plate A'is slotted vertically frorn .its upA per edge down, as shown at `c, wl1ilethe upper lip or projection, a, at the oppositefend of; the box slotted vertically from itsv lower edge up, as shown at c. `These n.otches,jwhcn the plate A is bent in cylindrical fornnare'locked together,'forminga joint at the upper end-.of the box (see Fig. 2) which. cannot spread apart. This joint isessentialat the upper part cf the box,'as the seam would otherwisespread apart at that 'point when the cover or lid B is removed. At the lower endet' the box n'o such joint is required, as the bottoni, d,'being1conl neet-ed to the lower ed geef A by a dan ged seam, e, keeps the lower part of thc-seam closed. lAv seam thus formed requires no solder for boxes or cans designed for holding dry articles. vFor sheetdnetal boxes orcans will 'be greatly facilitated, no hammering being required, anda nea-t joint obtained.

l claim asnew and-desire to secure by Let- DANIEL GROAK.

Witnesses:

, MATTHEW FEEINE, l WILLIAM PoLLARD.

inoistor wet articles the seam maybe soldered.A By this improvement the manufacture of. 

